The invention relates to a sea measurement apparatus and especially relates to a latch automation pulling mechanism in an expendable probe delivery system. The latch automation pulling mechanism in the expendable probe delivery system comprises the pulling mechanism, a fixing seat and an installation frame. The pulling mechanism is installed on the installation frame through the fixing seat. The fixing seat is formed by symmetrical left and right fixing blocks. An internal portion of one side of the fixing block is provided with a spring guide groove. The latch automation pulling mechanism in the expendable probe delivery system has advantages that after a probe is installed, through using an effect of a lever, force amplification is guaranteed in a limited stroke and a fixing latch of an expendable sea profile parameter measurement equipment probe can be automatically pulled so as to realize automatic delivery; the structure is simple and performance is stable.