A water tank experiment was carried out to study the resistance of the copper alloy woven net, for obtaining the resistance changing law of the series of specifications of copper alloy woven net. Ten square copper alloy nets of 0.25m2 were produced with different copper wire diameters and different mesh sizes. Three-component force sensors connected to the net were used to test the force of the net in the static water tank. The water tank test was carried out at 5 trailer speeds of 0.30, 0.45, 0.60, 0.75, and 0.85 m/s, respectively. Each net was measured at a range of 0°-90° attack angle at different flow rates, and there were resistance data for 10 attack angles at an interval of 10° as the nodes. The results showed that the resistance of the net increased with the increase of the flow velocity. Similarly, with the increase of the attack angle of the forward flow, the resistance of the net also increased; under a specific flow rate and angle of attack, the resistance of the net with the same wire diameter decreases with the increase of the mesh size; the resistance of the net with the same mesh size at a specific flow rate and attack angle increased with the increase of the wire diameter. Based on the test data, the calculation formula of the net resistance per unit area of the copper alloy woven net was obtained with the regression analysis method, when the vertical flow velocity changes with the flow velocity; the relationship between the resistance coefficient and the Reynolds number of the copper alloy woven net under the two states of vertical flow velocity and parallel flow velocity was obtained by using the dot graph regression analysis method; the derivation formula of the resistance coefficient under different attack angles was proposed by referring to the empirical formula, and the drag coefficients when the mesh plane was perpendicular to the flow velocity and parallel to the flow velocity were also given based on the experiment data, which are 1.20 and 0.21, respectively. This study can provide a reference for the calculation of the force and the analysis of the hydrodynamic performance of the copper alloy woven net.