The invention relates to a bucket tooth assembly which solves the problems that according to an existing bucket tooth assembly, a tooth sleeve easily shakes relative to a tooth base, and the tooth sleeve is not prone to maintenance. The bucket tooth assembly comprises a tooth base, a tooth sleeve and a locking part, a cavity with a backward opening is formed in the rear end of the tooth sleeve, a connecting plug which is inserted in the cavity of the rear end of the tooth sleeve in a sleeved mode is arranged at the front end of the tooth base, the locking part is arranged between the tooth base and the tooth sleeve, the connecting plug is provided with a columnar guide part which is low in front and high in rear and is inclined forwards, and the cavity of the rear end of the tooth sleeve is provided with an inner surface matched with the outer surface of the connecting plug in a complementing mode. According to the bucket tooth assembly, the connecting plug inserted in the tooth sleeve is provided with the columnar guide part which is low in front and high in rear and is inclined forwards, the columnar guide part plays a role in guiding and orbit determination, the guide direction is inconsistent with the direction of horizontal force frequently borne by the tooth sleeve in the working process, therefore, when the tooth sleeve works, self locking can be formed between the connecting plug and the tooth sleeve by the tooth sleeve, the strength requirement for the locking part is reduced, meanwhile, the fit clearance between the connecting plug and the tooth sleeve can be reduced better, and therefore shake of the tooth sleeve is reduced.