In order to clarify the effects of the dissolved oxygen levels and the influence of spacing and aerobic time on the dissolved oxygen level by micropore tube aerator on the bottom of apostichopus japonicus ponds, the concentrations of DO, NO2--N and COD  were detected during one oxygen increasingcycle (A 7-day cycle, 8h from 11:00 am to 7:00 am for oxygen increasing per day.) in sapostichopus japonicus ponds in summer. The results showed: the DO increased continuously during the 8-hour continuous period for oxygen increasing; The rising rate of DO was quiet low in the first 2 hours, increased rapidly during the middle 4 hours (2 to 6h), slowly decreased during the last 2 hours (6-8 h). The oxygen increasing for 8 hours continuously could solve the problem of low dissolution of oxygen in nights. The COD and NO2--N in the water reduced gradually after the 7 day- cycle of oxygen increasing. The concentration of NO2--N decreased from 0.025mg/L to 0.013mg/L, and the concentration of COD decreased from 18.46mg/L to 14.15mg/L. The concentration of DO in the water decreased along with the distance from the pipe. The concentration of DO remained at a high level at the distance from 1-2 m. The concentration of DO at the distance from 3~4m decreased slowly(having no significant difference with the concentration at the distance from 1-2 m: P＞0.05) with the value remaining at 5.22mg/L, while it decreased dramatically at the distance far from 5m (having a significant difference with the concentration at the distance from 1~ 2m: P＜0.05). All the results indicated that by micropore aerators, the concentrations of DO, NO2--N and COD in the water increased efficiently; the proper time for oxygen increasing were 6~8h and the suitable pipe spacing is 6~8m.