The utility model provides a subsea tree transfers installation testing instrument, including rings, rings connect, tool joint, the instrument cap, fixing sleeve, a piston rod, the top seal gland, a piston, survey test bar, tool body, the locking driving cylinder, the opening catch, the sleeve is accepted to the catch, the horn mouth, the stop pin nail, the cover is pressed to the catch, the coveris pressed to the production tree, the feather key, bottom sealing gland, cylinder and unblock sliding sleeve, rings pass through pin joint with the rings joint, rings connect and tool joint threadedconnection, tool joint and survey test bar threaded connection, the outer end suit of surveying test bar has the unblock sliding sleeve, fixing sleeve threaded connection is in the outside of surveying the test bar upper end, the instrument cap thread is installed on tool joint, tool body butterfly valve inner chamber threaded connection has the production tree to press the cover, the productiontree is pressed the cover outside to be provided with the catch and presses the cover, the production tree instrument of transferring is various in having solved prior art, the function singleness isfrequent, retrieve the installation time overlength scheduling problem that the change instrument leads to.