Abstract: To resolve the plant field problems during the test and start-up,the problem cause shall be found out firstly.To make up the optimized method with the field environment,the relation of design,system operation and test method shall be clear.Some problems for plant test and start-up,such as the valve control problem of boron recycle system（REA）,the signal block of residual heat removal system（RRA） and the pump false start-up of auxiliary feed water system（ASG） are stated.With deep understanding to the plant field environment and communicating with each one,the problem solutions are addressed in detail.