A blade adjustment mechanism, applied to an air circulator comprising a housing provided with an air outlet, whereby the blade adjustment mechanism comprises: a fixing bracket, fixedly connected with the housing and provided with a sliding space; at least two adjustment members, a part of each of the at least two adjustment members being accommodated in the sliding space and being slidably connected with the fixing bracket, each of the at least two adjustment members provided with a first adjustment slot at an end adjacent to the air outlet; and at least two first wind deflectors, a part of the first wind deflector extending into the air outlet and being rotationally connected with the fixing bracket, a part of the first wind deflectors facing away from the air outlet being movably accommodated in the first adjustment slot; wherein the at least two adjustment members are configured to move away from or move closer to each other, and the first adjustment slot is configured to rotate the first wind deflectors to make the air outlet to blow air divergently or concentratedly, wherein a side of one of the at least two adjustment members adjacent to the at least two first wind deflectors further comprises at least one second adjustment slot; the blade adjustment mechanism further comprises at least one second wind deflector located between the at least two first wind deflectors and rotationally connected with the fixing bracket; a part of the at least one second wind deflector extending into the air outlet, a part of the second wind deflector facing away from the air outlet being movably accommodated in one of the at least one second adjustment slot, the at least two adjustment members are configured to move away from or move closer to each other, the at least one second adjustment slot is configured to rotate the at least one second wind deflector to make the air outlet to blow air divergently or concentratedly, characterized in that an extension length of the first adjustment slot is smaller than an extension length of the second adjustment slot; and a length of the part of the first wind deflectors extending into the first adjustment slot is smaller than a length of the part of the second wind deflector extending into the second adjustment slot. a fixing bracket, fixedly connected with the housing and provided with a sliding space; at least two adjustment members, a part of each of the at least two adjustment members being accommodated in the sliding space and being slidably connected with the fixing bracket, each of the at least two adjustment members provided with a first adjustment slot at an end adjacent to the air outlet; and at least two first wind deflectors, a part of the first wind deflector extending into the air outlet and being rotationally connected with the fixing bracket, a part of the first wind deflectors facing away from the air outlet being movably accommodated in the first adjustment slot; wherein the at least two adjustment members are configured to move away from or move closer to each other, and the first adjustment slot is configured to rotate the first wind deflectors to make the air outlet to blow air divergently or concentratedly, wherein a side of one of the at least two adjustment members adjacent to the at least two first wind deflectors further comprises at least one second adjustment slot; the blade adjustment mechanism further comprises at least one second wind deflector located between the at least two first wind deflectors and rotationally connected with the fixing bracket; a part of the at least one second wind deflector extending into the air outlet, a part of the second wind deflector facing away from the air outlet being movably accommodated in one of the at least one second adjustment slot, the at least two adjustment members are configured to move away from or move closer to each other, the at least one second adjustment slot is configured to rotate the at least one second wind deflector to make the air outlet to blow air divergently or concentratedly, characterized in that an extension length of the first adjustment slot is smaller than an extension length of the second adjustment slot; and a length of the part of the first wind deflectors extending into the first adjustment slot is smaller than a length of the part of the second wind deflector extending into the second adjustment slot.