A clock tree circuit, comprising: a first clock source, generating a first signal (Si); and a first tree circuit, comprising: a first driving unit, wherein the first driving unit has an input terminal for receiving the first signal (Si), and an output terminal coupled to a first node; a second driving unit, wherein the second driving unit has an input terminal coupled to the first node, and an output terminal coupled to a second node; a third driving unit, wherein the third driving unit has an input terminal coupled to the first node, and an output terminal coupled to a third node; a fourth driving unit, wherein the fourth driving unit has an input terminal coupled to the second node, and an output terminal; a fifth driving unit, wherein the fifth driving unit has an input terminal coupled to the third node, and an output terminal; and a metal connection element, coupled between the second node and the third node, and configured as a short-circuited element; characterised in that the first tree circuit further comprises: one or more metal shielding elements, disposed adjacent to the metal connection element; wherein a width of the metal connection element is from 5 to 6 times greater than a minimum metal width in a process for manufacturing the clock tree circuit; and wherein spacing between the metal connection element and each metal shielding element is from 5 to 6 times greater than a minimum metal width in a process for manufacturing the clock tree circuit. a first clock source, generating a first signal (Si); and a first tree circuit, comprising: a first driving unit, wherein the first driving unit has an input terminal for receiving the first signal (Si), and an output terminal coupled to a first node; a second driving unit, wherein the second driving unit has an input terminal coupled to the first node, and an output terminal coupled to a second node; a third driving unit, wherein the third driving unit has an input terminal coupled to the first node, and an output terminal coupled to a third node; a fourth driving unit, wherein the fourth driving unit has an input terminal coupled to the second node, and an output terminal; a fifth driving unit, wherein the fifth driving unit has an input terminal coupled to the third node, and an output terminal; and a metal connection element, coupled between the second node and the third node, and configured as a short-circuited element; characterised in that the first tree circuit further comprises: one or more metal shielding elements, disposed adjacent to the metal connection element; wherein a width of the metal connection element is from 5 to 6 times greater than a minimum metal width in a process for manufacturing the clock tree circuit; and wherein spacing between the metal connection element and each metal shielding element is from 5 to 6 times greater than a minimum metal width in a process for manufacturing the clock tree circuit. a first driving unit, wherein the first driving unit has an input terminal for receiving the first signal (Si), and an output terminal coupled to a first node; a second driving unit, wherein the second driving unit has an input terminal coupled to the first node, and an output terminal coupled to a second node; a third driving unit, wherein the third driving unit has an input terminal coupled to the first node, and an output terminal coupled to a third node; a fourth driving unit, wherein the fourth driving unit has an input terminal coupled to the second node, and an output terminal; a fifth driving unit, wherein the fifth driving unit has an input terminal coupled to the third node, and an output terminal; and a metal connection element, coupled between the second node and the third node, and configured as a short-circuited element; characterised in that the first tree circuit further comprises: one or more metal shielding elements, disposed adjacent to the metal connection element; wherein a width of the metal connection element is from 5 to 6 times greater than a minimum metal width in a process for manufacturing the clock tree circuit; and wherein spacing between the metal connection element and each metal shielding element is from 5 to 6 times greater than a minimum metal width in a process for manufacturing the clock tree circuit. one or more metal shielding elements, disposed adjacent to the metal connection element; wherein a width of the metal connection element is from 5 to 6 times greater than a minimum metal width in a process for manufacturing the clock tree circuit; and wherein spacing between the metal connection element and each metal shielding element is from 5 to 6 times greater than a minimum metal width in a process for manufacturing the clock tree circuit.