The invention provides a waterproof anti-sticking portable probe of a sliding inclinometer, which is characterized by being divided into an upper half and a lower half, wherein the upper half is orderly connected with a non-extension cable, a probe connector, a sensor cavity, an anti-sticking connector, an upper guide pulley and a portable connector tenon in a portable connector from the top down in series; and the lower half is orderly connected with a probe portable connector mortise in the portable connector, a lower guide pulley and a buffering rubber mat at the lower end of the probe from the top down in series. The invention has the advantage that the cable and the probe sensor cavity are in sealing connect state and the probe can be split at the portable connector when necessary so as to achieve good waterproof sealing effect. When the probe is stuck while going upwards along an inclinometer conduit, the anti-sticking connector can automatically abandon the lower part of the probe to retain the sensor; therefore, the direct loss is reduced and the connectivity of the test data is indirectly guaranteed. After the probe is connected with the cable, the total length is about 80 cm, the probe is split at the portable connector after the measurement is completed, and the length is halved after the splitting, so that the protection of the probe sensor and the storage and carrying of the probe are convenient.